Carrier bearing method and device, and radio remote unit

ABSTRACT

The present disclosure discloses a carrier bearing method and device, and a base station. The carrier bearing method includes: obtaining transmit power of each carrier borne on all power amplifiers in a radio remote unit after detecting that transmit power of a carrier borne on a power amplifier in the radio remote unit changes; adjusting a correspondence between the carriers and the power amplifier in the radio remote unit according to the obtained transmit power; and bearing each carrier on its corresponding power amplifier according to the adjusted correspondence. The device and base station are used to implement the above method.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.13/662,136, filed on Oct. 26, 2012, which is a continuation ofInternational Application No. PCT/CN2011/080202, filed on Sep. 27, 2011.The International application claims priority to Chinese PatentApplication No. 201110033906.X, filed on Jan. 31, 2011. Theafore-mentioned patent applications are hereby incorporated by referencein their entireties.

FIELD

The present disclosure relates to the field of radio communicationtechnologies, and in particular, to a carrier bearing method and device,and a radio remote unit.

BACKGROUND

A base station in a radio communication system generally includes aradio remote unit (Radio Remote Unit, RRU). A radio remote unit mayinclude multiple multi-carrier power amplifiers. Each multi-carrierpower amplifier may bear multiple carrier signals to implement poweramplification for the carrier signals.

When an existing base station runs, each carrier is borne on themulti-carrier power amplifiers in the radio remote unit and then thesignal with amplified power is transmitted.

During research of the prior art, the inventor finds that when the radioremote unit in the prior art bears carriers, it bears the carriers onthe corresponding power amplifiers according a preset correspondencebetween the carriers and the power amplifier. During running of the basestation, the preset correspondence is fixed; however, the transmit powerof a carrier changes with the impact of the power control, usermobility, and channel change status. In the prior art, proper poweramplifiers cannot be flexibly selected for bearing carriers, accordingto the change of the transmit power of the carriers. The efficiencycurve of a power amplifier is generally non linear. This results in lowaverage work efficiency of the power amplifier.

SUMMARY

The present disclosure provides a carrier bearing method and device, anda radio remote unit, to flexibly select a proper power amplifier to bearcarriers, according to the transmit power of the carriers.

To solve the above problem, embodiments of the present disclosureprovide the following solutions: An embodiment of the present disclosureprovides a carrier bearing method. The method includes: obtainingtransmit power of each carrier borne on all power amplifiers in a radioremote unit after detecting that transmit power of a carrier borne on apower amplifier in the radio remote unit changes; adjusting acorrespondence between the carriers and the power amplifier in the radioremote unit according to the obtained transmit power; and bearing eachcarrier on its corresponding power amplifier according to the adjustedcorrespondence.

An embodiment of the present disclosure provides a carrier bearingdevice. The device includes a carrier power obtaining unit, acorrespondence adjusting unit, and a carrier bearing unit. The carrierpower obtaining unit is configured to obtain transmit power of eachcarrier borne on power amplifiers in a radio remote unit after detectingthat transmit power of a carrier borne on a power amplifier in the radioremote unit changes. The correspondence adjusting unit is configured toadjust a correspondence between the carriers and the power amplifier inthe radio remote unit according to the obtained transmit power. Thecarrier bearing unit is configured to bear each carrier on itscorresponding power amplifier according to the adjusted correspondence.

An embodiment of the present disclosure further provides a base stationincluding the above carrier bearing device.

According to the carrier bearing method and device, and the base stationprovided in the embodiments of the present disclosure, when the transmitpower of a carrier changes, the correspondence in the radio remote unitis adjusted according to the changed transmit power. Compared with theprior art where only one correspondence can be used, the correspondencecan be adjusted in the present disclosure according to the change of thetransmit power of a carrier, to obtain a proper correspondence between apower amplifier and carriers. In this way, a proper power amplifier maybe flexibly selected for bearing, according to the change of thetransmit power of the carrier, and the average work efficiency of thepower amplifier is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

To make the solutions of the embodiments of the present disclosureclearer, the accompanying drawings for illustrating the embodiments ofthe present disclosure are briefly described below. Apparently, theaccompanying drawings to be described in the following are only aboutsome embodiments of the present disclosure, and persons of ordinaryskill in the art can derive other drawings from the accompanyingdrawings without any creative effort.

FIG. 1 is a flowchart of a carrier bearing method according to a firstembodiment of the present disclosure;

FIG. 2 is a flowchart of a carrier bearing method according to a secondembodiment of the present disclosure;

FIG. 3 is a flowchart of a carrier bearing method according to a thirdembodiment of the present disclosure;

FIG. 4 is a flowchart of a carrier bearing method according to a fourthembodiment of the present disclosure;

FIG. 5 is an efficiency curve of a power amplifier according to anembodiment of the present disclosure;

FIG. 6 is a flowchart of a carrier bearing method according to a fifthembodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a carrier bearing deviceaccording to a sixth embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of an embodiment illustrating acorrespondence adjusting unit in a carrier bearing device according toan embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of an embodiment illustrating acorrespondence adjusting unit in a carrier bearing device according toanother embodiment of the present disclosure; and

FIG. 10 is a schematic structural diagram of a base station according toa seventh embodiment of the present disclosure.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The solutions disclosed in the embodiments of the present disclosure aredescribed below with reference to embodiments and accompanying drawings.Evidently, the embodiments are exemplary only, and the presentdisclosure is not limited to such embodiments. Persons of ordinary skillin the art can derive other embodiments from the embodiments givenherein without making any creative effort, and all such embodiments arecovered in the scope of the present disclosure.

Embodiments of the present disclosure provide a carrier bearing methodand device, and a radio remote unit. To better understand the solutionsof the present disclosure, the following describes in detail theembodiments of the present disclosure with reference to accompanyingdrawings.

Referring to FIG. 1, a flowchart of a carrier bearing method accordingto a first embodiment of the present disclosure is illustrated.

The carrier bearing method according to the first embodiment of thepresent disclosure includes the following steps:

101. Obtain transmit power of each carrier borne on power amplifiers ina radio remote unit if detecting that transmit power of a carrier borneon a power amplifier in the radio remote unit changes.

Specifically, the transmit power of the carrier borne on the poweramplifier in the radio remote unit changes with impact of power control,user mobility, and channel status. According to the embodiments of thepresent disclosure, a carrier bearing device obtains the currenttransmit power of each carrier borne on the power amplifiers in theradio remote unit after detecting that the transmit power changes.

102. Adjust a correspondence between the carriers and the poweramplifier in the radio remote unit according to the obtained transmitpower.

Specifically, the carrier bearing device may adjust an initialcorrespondence in the radio remote unit according to the obtainedtransmit power. The initial correspondence is an initially setcorrespondence between the power amplifier and the carriers. Whenbearing a carrier for the first time, the radio remote unit bears thecarrier on a corresponding power amplifier according to the aboveinitial correspondence. In actual applications, the currentcorrespondence between the carriers and the power amplifier may also beused as the initial correspondence. That is, the current correspondenceis adjusted to implement dynamic adjustment of the correspondencebetween the carriers and the power amplifier during applications.Alternatively, it may also be considered that during the dynamicadjustment of the correspondence between the carriers and the poweramplifier, a first adjusted correspondence is the initialcorrespondence.

103. Bear each carrier on its corresponding power amplifier according tothe adjusted correspondence.

Specifically, the carrier bearing device bears each carrier on itscorresponding power amplifier according to the adjusted correspondence.

According to the carrier bearing method provided in the embodiments ofthe present disclosure, when the transmit power of a carrier changes,the correspondence in the radio remote unit is adjusted according to thechanged transmit power. Compared with the prior art where only onecorrespondence can be used, the correspondence can be adjusted accordingto the change of the transmit power of a carrier to obtain a propercorrespondence between a power amplifier and carriers in the presentdisclosure. In this way, a proper power amplifier may be flexiblyselected for bearing a carrier, according to the change of the transmitpower of the carrier, and the average work efficiency of the poweramplifier is improved.

Further, in the first embodiment of the present disclosure, duringadjustment of the correspondence, the total input power P1 required byall power amplifiers in the radio remote unit under the adjustedcorrespondence is smaller than the total input power P2 required by allpower amplifiers under the correspondence. The carrier bearing devicemay obtain the total input power required by all power amplifiers underthe correspondence and multiple different adjusted correspondences, andselect a correspondence corresponding to the total input power that issmaller than P1. The carrier bearing device bears each carrier on itscorresponding power amplifier according to the adjusted correspondence,which improves the average work efficiency of each power amplifier.

Further, in the first embodiment of the present disclosure, when thecorrespondence is adjusted according to the obtained transmit power, thetotal input power required by all power amplifiers in the radio remoteunit under the adjusted correspondence can be minimized. Therefore,after the carriers are borne on the corresponding power amplifiersaccording to the adjusted correspondence, as compared with other bearingmanners, the average work efficiency of the power amplifiers in theradio remote unit is the highest.

Referring to FIG. 2, a flowchart of a carrier bearing method accordingto a second embodiment of the present disclosure is illustrated.

In this embodiment of the present disclosure, multiple carriers need tobe borne on the power amplifiers in an RRU. The transmit power of acarrier may change with impact of power control, user mobility, and achannel change status. The carrier bearing method according to thesecond embodiment of the present disclosure includes the followingsteps:

201. Obtain transmit power of each carrier among f carriers borne onpower amplifiers in a radio remote unit after detecting that transmitpower of a carrier borne on a power amplifier in the radio remote unitchanges, where f is an integer larger than 1.

Specifically, the total number of carriers required to be borne on thepower amplifiers is f, where f is an integer larger than 1. A carrierbearing device obtains the transmit power of each carrier afterdetecting that the transmit power of a carrier changes.

202. Calculate the total input power of all power amplifiers under eachof n correspondences between the carriers and the power amplifiers,where n is an integer smaller than or equal to pf, and p is the totalnumber of power amplifiers in the radio remote unit and p is an integerlarger than 1.

Specifically, the carrier bearing device determines n correspondencesbetween the carriers and the power amplifiers for f carriers, andcalculates the total input power of all power amplifiers under eachcorrespondence according to the efficiency curve of a power amplifier.

The efficiency curve of a power amplifier is a correspondence betweenthe output power of the power amplifier and the work efficiency of thepower amplifier. In this embodiment of the present disclosure, the sumof the power required for bearing carriers on the power amplifier isoutput power of the power amplifier. The output power of the poweramplifier may be calculated according to the efficiency curve and outputpower of the power amplifier.

203. Obtain a correspondence that is between the carriers and the poweramplifier and is corresponding to the minimum total input power among ntotal input power values.

Specifically, the carrier bearing device selects a correspondence thatis between the carriers and the power amplifier and is corresponding tothe minimum value of n total input power values. The correspondence isthe adjusted correspondence.

204. Bear f carriers on the corresponding power amplifiers according tothe adjusted correspondence.

Specifically, the carrier bearing device bears each carrier on itscorresponding power amplifier according to the selected correspondencebetween the carriers and the power amplifier.

According to the carrier bearing method provided in the secondembodiment of the present disclosure, the total input power required byall power amplifiers under all available correspondences is calculated,and a correspondence corresponding to the minimum total input powervalue is selected. Under the selected correspondence, the total inputpower required by the power amplifiers in the radio remote unit can bethe minimum. Compared with the prior art where only one correspondencecan be used, a proper correspondence can be obtained according to thetransmit power of multiple carriers required to be borne in the presentdisclosure, so that a proper power amplifier may be flexibly selectedfor bearing a carrier, according to the change of the power of thecarrier. In this way, the required total input power is the minimum andthe average work efficiency of the power amplifier is high.

Further, in the method provided in the second embodiment of the presentdisclosure, traverse times n may be simplified according to the featuresof the power amplifiers in the RRU. For example, the carrier bearingdevice may obtain the minimum number m of the power amplifiers requiredfor bearing f carriers, according to the maximum output power of a poweramplifier or the maximum number of carriers on a power amplifier, andthen calculate the total input power of all amplifiers under each of mfcorrespondences between the carriers and the power amplifiers to obtaina correspondence that is between the carriers and the power amplifierand is corresponding to the minimum total input power value among mftotal input power values. Compared with the calculation of total pfinput power values in the second embodiment, implementation complexityis reduced. According to the features of the RRU (for example, a main Bcarrier must be borne on a first power amplifier), the carrier bearingdevice may further reduce the number of total input power valuesrequired to be calculated, so as to further reduce the implementationcomplexity.

Referring to FIG. 3, a flowchart of a carrier bearing method accordingto a third embodiment of the present disclosure is illustrated.

The carrier bearing method according to the third embodiment of thepresent disclosure includes:

301. Obtain transmit power of each carrier among f carriers borne onpower amplifiers in a radio remote unit after detecting that transmitpower of a carrier borne on a power amplifier in the radio remote unitchanges, where f is an integer larger than 1.

Specifically, the total number of carriers required to be borne on thepower amplifiers is f, where f is an integer larger than 1. A carrierbearing device obtains the transmit power of each carrier afterdetecting that the transmit power of a carrier changes.

302. Obtain the minimum value m of the number of power amplifiersrequired for bearing f carriers in the radio remote unit, where m is aninteger larger than 1.

Specifically, the carrier bearing device may obtain the minimum value mof the number of power amplifiers required for bearing f carriers,according to the sum of the air interface transmit power required byeach carrier, the maximum output power of each of p power amplifiers,and the maximum number of carriers on each power amplifier, where m isan integer larger than 1. In the embodiment of the present disclosure,the number of power amplifiers used is reduced as much as possible, soas to further improve the average efficiency of the power amplifier.

303. Adjust the correspondence according to the obtained transmit power,so that the mean square error of the output power of m power amplifiersin the radio remote unit under the adjusted correspondence is theminimum or the difference between the maximum value and the minimumvalue of the output power of m power amplifiers is the minimum.

The carrier bearing device may adjust the correspondence according tothe obtained transmit power, so that the output power of m poweramplifiers under the adjusted correspondence is approximate, that is,the power of f carriers is averagely allocated to m power amplifiers forbearing.

Specifically, when the carrier bearing device adjusts thecorrespondence, the mean square error of the output power of m poweramplifiers under the correspondence between the carriers and the poweramplifier (the correspondence when the output power of the poweramplifiers is approximate) is the minimum, or the difference between themaximum value and the minimum value of the output power of m poweramplifiers is the minimum. According to the embodiment of the presentdisclosure, a correspondence that satisfies a requirement may beobtained according to the above two determining criteria. It should benoted that in the embodiment of the present disclosure, otherdetermining criteria may also be used to obtain a correspondence underwhich the output power of the power amplifiers is approximate.

304. Bear f carriers on the corresponding power amplifiers according tothe adjusted correspondence.

The execution process of step 304 is the same as that of step 203 in thesecond embodiment, and details are not described herein.

The efficiency curve of a power amplifier is generally sub-linear(sub-linear). When the efficiency of the power amplifier increases, theoutput power of the power amplifier is not linear, that is, if theoutput power of the power amplifier increases twice, the efficiency ofthe power amplifier generally increases less than twice. Therefore, thepower is allocated averagely as much as possible to multiple poweramplifiers, to ensure the highest average efficiency.

In the carrier bearing method provided in the third embodiment of thepresent disclosure, a correspondence between the carriers and the poweramplifier when the output power required by m power amplifiers isapproximate is obtained. Under the obtained correspondence, the totalinput power required by the power amplifiers in the radio remote unit isthe minimum. Compared with the prior art where only one correspondencecan be used, a proper correspondence can be obtained according to thetransmit power of multiple carriers required to be borne in the presentdisclosure, so that a proper power amplifier is flexibly selected forbearing carriers, according to the change of the power of the carriers.In this way, the required total input power is the minimum and theaverage work efficiency of the power amplifier is high.

It should be noted that, the second and third embodiments provide onlytwo methods for obtaining the correspondence between the carriers andthe power amplifier when the total input power required by p poweramplifiers is the minimum. Those skilled in the art may use othermethods to obtain the correspondence.

To better understand the embodiment of the present disclosure, thefollowing provides a specific application scenario where the carrierbearing method provided in the embodiment of the present disclosure isused.

In this application scenario, for example, in a GSM system with fourcarriers and two power amplifiers, the number of carriers required to beborne is 4. An RRU includes two power amplifiers, that is, poweramplifier 1 and power amplifier 2.

Referring to FIG. 4, a flowchart of a carrier bearing method accordingto a fourth embodiment of the present disclosure is illustrated.

The carrier bearing method according to the fourth embodiment of thepresent disclosure includes the following steps:

401. Detect that the transmit power of carrier 1 borne on poweramplifier 1 in the radio remote unit changes, and obtain the transmitpower of four carriers required to be borne.

The transmit power of carrier 1 borne on power amplifier 1 changes from8 W to 15 W, and the transmit power of four carriers that is obtained bya carrier bearing device is 15 W, 3 W, 5 W, and 0 W. A correspondence inthe radio remote unit is that carriers 1 and 2 correspond to poweramplifier 1 and carriers 3 and 4 correspond to power amplifier 2.

402. Obtain the minimum value m of the number of power amplifiersrequired for bearing four carriers.

The maximum number of carriers borne on each power amplifier is 2, andthe minimum value m of the number of power amplifiers required forbearing four carriers is equal to 2. According to the minimum value ofthe number of power amplifiers, the number of correspondences betweenthe carriers and the power amplifiers is reduced from 24=16 to C42=6.

In addition, in a GSM system, a main B carrier generally has a fixedcorrespondence with a certain power amplifier. In the embodiment of thepresent disclosure, the main B carrier (a carrier with the power of 15W) has a fixed correspondence with power amplifier 1. Therefore, thenumber of correspondences between the carriers and the power amplifiersis reduced from six to three. Table 1 shows the correspondences.

TABLE 1 No. Power Amplifier 1 Power Amplifier 2 1 15 W, 3 W 5 W, 0 W 215 W, 5 W 3 W, 0 W 3 15 W, 0 W 5 W, 3 W

403. Calculate the total input power of all power amplifiers under eachof the above three correspondences between the carriers and the poweramplifiers.

In the embodiment of the present disclosure, the efficiency curves ofpower amplifier 1 and power amplifier 2 are shown in FIG. 5. Accordingto the efficiency curves, the calculated total input power under the No.1 correspondence (initial correspondence) is 83.10+59.23=142.3 W; thecalculated total input power under the No. 2 correspondence is88.14+70.91=159 W; the calculated total input power under the No. 3correspondence is 75.85+60.46=136.3 W.

404. Obtain a correspondence corresponding to the minimum total inputpower value among the three total input power values.

In the embodiment of the present disclosure, the total input power underthe No. 3 correspondence is the minimum, and the carrier bearing deviceobtains the No. 3 correspondence.

405. Bear four carriers on the corresponding power amplifiers accordingto the obtained correspondence.

Specifically, the carrier bearing device bears the carrier with thepower of 15 W and the carrier with the power of 0 W on power amplifier 1and bears the carrier with the power of 5 W and the carrier with thepower of 3 W on power amplifier 2.

In the embodiment of the present disclosure, if the maximum number ofcarriers that can be borne on a power amplifier is 3, a correspondenceis added when step 403 is performed in the embodiment of the presentdisclosure. That is, the carrier with the power of 15 W, the carrierwith the power of 3 W, and the carrier with the power of 5 W are borneon power amplifier 1, and the carrier with the power of 0 W is borne onpower amplifier 2. According to the efficiency curves of the poweramplifiers, the calculated total input power under the correspondence is99.67 W, which is smaller than the total input power 136.3 W under theNo. 3 correspondence. According to the embodiment of the presentdisclosure, the carrier with the power of 15 W, the carrier with thepower of 3 W, and the carrier with the power of 5 W are borne on poweramplifier 1, and the carrier with the power of 0 W is borne on poweramplifier 2, so as to achieve the highest work efficiency.

Further, according to the embodiment of the present disclosure, atimeslot shutdown technology may also be applied to a power amplifierhaving the power of 0 W, to reduce static power consumption.

The following describes another application scenario where the carrierbearing method is used according to an embodiment of the presentdisclosure. In this application scenario, for example, in a GSM systemwith six carriers and two power amplifiers, the number of carriersrequired to be borne is 6. An RRU includes two power amplifiers, thatis, power amplifier 1 and power amplifier 2.

Referring to FIG. 6, a flowchart of a carrier bearing method accordingto a fifth embodiment of the present disclosure is illustrated.

The carrier bearing method according to the fifth embodiment of thepresent disclosure includes the following steps:

501. Detect that the transmit power of carrier 1 borne on poweramplifier 1 in a radio remote unit changes, and obtain the transmitpower of six carriers required to be borne.

The transmit power of carrier 1 borne on power amplifier 1 changes from8 W to 15 W, and the transmit power of six carriers that is obtained bya carrier bearing device is 15 W, 10 W, 5 W, 3 W, 2 W, and 0 W. Aninitial correspondence in the radio remote unit is that carriers 1, 2,and 3 correspond to power amplifier 1 and carriers 4, 5, and 6correspond to power amplifier 2.

502. Obtain the minimum value m of the number of power amplifiersrequired for bearing six carriers.

Specifically, in the embodiment of the present disclosure, the maximumnumber of carriers that can be borne on each power amplifier is 4.Therefore, the minimum value m of the number of power amplifiersrequired for bearing six carriers is 2.

503. Adjust a correspondence according to the obtained transmit power,to make the difference between the maximum value and the minimum valueof the output power of two power amplifiers in the radio remote unitunder the adjusted correspondence to be the minimum.

In the embodiment of the present disclosure, according to the principlethat power is allocating averagely as much as possible to poweramplifiers, the initial correspondence is adjusted to a correspondencebetween the carriers and the power amplifier under which the input powerrequired by two power amplifiers is approximate. The difference betweenthe maximum value and the minimum value of the output power of two poweramplifiers that is corresponding to the correspondence between thecarriers and the power amplifier (a correspondence under which the inputpower of the power amplifiers is approximate) is the minimum. It shouldbe noted that the carrier bearing device may also obtain acorrespondence under which the mean square error of the input power oftwo power amplifiers is the minimum.

In addition, in the embodiment of the present disclosure, the positionof the main B carrier with the power of 15 W is limited, and the carrieris fixedly matched to power amplifier 1.

Specifically, in the embodiment of the present disclosure, a requiredcorrespondence may be obtained by sorting in descending order. That is,the main B carrier corresponds to power amplifier 1, the carrier withthe power of 10 W corresponds to power amplifier 2, the carrier with thepower of 5 W corresponds to power amplifier 2, the carrier with thepower of 3 W corresponds to power amplifier 1, the carrier with thepower of 2 W corresponds to power amplifier 2, and so on. The powerrequired to be borne on power amplifier 1 is 15+3=18 W, and the powerrequired to be borne on power amplifier 2 is 10+5+2=17 W. The differencebetween the power required to be borne on power amplifier 1 and thepower required to be borne on power amplifier 2 is 1, and is the minimumas compared with other correspondences.

504. Bear six carriers on the corresponding power amplifiers accordingto the correspondence.

Specifically, the carrier bearing device bears the main B carrier onpower amplifier 1, the carrier with the power of 10 W on power amplifier2, the carrier with the power of 5 W on power amplifier 2, the carrierwith the power of 3 W on power amplifier 1, and the carrier with thepower of 2 W on power amplifier 2, so as to achieve the highest poweramplifier efficiency.

The above describes the carrier bearing method provided in theembodiments of the present disclosure in detail. The embodiments of thepresent disclosure also provide a carrier bearing device correspondingto the method embodiments. The device may be arranged in a base stationin each mode, and is configured to adjust a correspondence betweencarriers and power amplifier; or may be arranged in a radio remote unit.When the base station has a radio remote unit, a power amplifier may beconfigured in the radio remote unit. The implementation of the method inthe device and the base station embodiments is described above. Thedevice and the base station may implement the above method. Therefore,the processes described in the method are also processing procedures forthe device.

Referring to FIG. 7, a schematic structural diagram of a carrier bearingdevice according to a sixth embodiment of the present disclosure isillustrated.

The carrier bearing device according to the sixth embodiment of thepresent disclosure may include:

-   -   a carrier power obtaining unit 610, configured to obtain        transmit power of each carrier borne on power amplifiers in a        radio remote unit after detecting that transmit power of a        carrier borne on a power amplifier in the radio remote unit        changes;    -   a correspondence adjusting unit 620, configured to adjust a        correspondence between the carriers and the power amplifier in        the radio remote unit according to the obtained transmit power;        and    -   a carrier bearing unit 630, configured to bear each carrier on        its corresponding power amplifier according to the adjusted        correspondence.

The carrier bearing device provided in the sixth embodiment of thepresent disclosure may be applied in the first embodiment illustratingthe carrier bearing method. For details, reference can be made to thedescription of the first embodiment.

According to the carrier bearing device provided in the embodiment ofthe present disclosure, when the transmit power of a carrier changes,the correspondence adjusting unit 620 adjusts the correspondence in theradio remote unit according to the changed transmit power. Compared withthe prior art where only one correspondence can be used, an initialcorrespondence can be adjusted according to the change of the transmitpower of a carrier in the present disclosure to obtain a propercorrespondence between a power amplifier and carriers. In this way, aproper power amplifier may be flexibly selected for bearing, accordingto the change of the transmit power of the carrier, and the average workefficiency of the power amplifier is improved.

Referring to FIG. 8, a schematic structural diagram of a correspondenceadjusting unit in the carrier bearing device according to an embodimentof the present disclosure is illustrated.

In the carrier bearing device provided in the sixth embodiment of thepresent disclosure, the correspondence adjusting unit 620 includes:

-   -   a power amplifier quantity obtaining module 621, configured to        obtain the minimum value m of the number of power amplifiers        required for bearing f carriers, where m is an integer larger        than 1, f is the total number of carriers borne on all power        amplifiers in the radio remote unit, and f is an integer larger        than 1; and    -   a correspondence adjusting module 622, configured to adjust the        correspondence according to the obtained transmit power, so that        the mean square error of the output power of m power amplifiers        in the radio remote unit under the adjusted correspondence is        the minimum or the difference between the maximum value and the        minimum value of the output power of m power amplifiers is the        minimum.

In this embodiment of the present disclosure, the correspondenceadjusting module 622 adjusts the correspondence, so that the outputpower required by m power amplifiers is approximate. The adjustedcorrespondence may make the total input power required by the poweramplifiers in the radio remote unit to be the minimum, so as to maximizethe average efficiency of the power amplifiers.

Referring to FIG. 9, a schematic structural diagram of a correspondenceadjusting unit in the carrier bearing device according to anotherembodiment of the present disclosure is illustrated.

In the carrier bearing device provided in the sixth embodiment of thepresent disclosure, the correspondence adjusting unit 620 mayspecifically include:

-   -   a power calculating module 623, configured to calculate the        total input power of all power amplifiers under each of n        correspondences between the carriers and the power amplifiers        according to the obtained transmit power, where n is an integer        smaller than or equal to p^(f), p is the total number of power        amplifiers in the radio remote unit, and is an integer larger        than 1, and f is the number of carriers borne on all power        amplifiers in the radio remote unit and is an integer larger        than 1; and    -   a first obtaining module 624, configured to obtain a        correspondence that is between the carriers and the power        amplifier and is corresponding to the minimum total input power        value among n total input power values, where the correspondence        between the carriers and the power amplifier is the adjusted        correspondence.

The power calculating module 623 may further include:

-   -   a first obtaining submodule 6231, configured to obtain the        minimum value m of the number of power amplifiers required for        bearing f carriers in the radio remote unit, where f is the        total number of carriers borne on all power amplifiers in the        radio remote unit, and f is an integer larger than 1; and    -   a calculating submodule 6232, configured to calculate the total        input power of all power amplifiers under each of m^(f)        correspondences between the carriers and the power amplifiers.

The obtaining, by the first obtaining module 624 in the carrier bearingdevice, the correspondence that is between the carriers and the poweramplifier and is corresponding to the minimum total input power valueamong n total input power values may specifically include:

-   -   obtaining, by the first obtaining module 624, a correspondence        that is between the carriers and the power amplifier and is        corresponding to the minimum total input power value among m^(f)        total input power values.

In this embodiment of the present disclosure, by obtaining the minimumvalue m of the number of required power amplifiers, the first obtainingsubmodule 6231 can simplify the complexity of calculating the totalinput power of the power amplifiers by the calculating submodule 6232,reduce the implementation complexity of the power calculating module 623and the first obtaining module 624, so as to further improve the workefficiency of the power amplifiers.

Referring to FIG. 10, a schematic structural diagram of a base stationaccording to a seventh embodiment of the present disclosure isillustrated.

An embodiment of the present disclosure further provides a base station,including power amplifiers 701 and a carrier bearing device 702.

The power amplifiers 701 are configured to bear carriers and performpower amplification for the borne carriers. The carrier bearing device702 is configured to obtain the transmit power of each of the carriersborne on the power amplifiers after detecting that the transmit power ofa carrier borne on a power amplifier changes; adjust a correspondencebetween the carriers and the power amplifier according to the obtainedtransmit power; and bear each carrier on its corresponding poweramplifier according to the adjusted correspondence.

The carrier bearing device, which is the same as that provided in thesixth embodiment, is configured to adjust the correspondence betweencarriers and a power amplifier 701. For details, reference can be madeto the sixth embodiment, and no repeated description is provided herein.

It should be noted that the information interaction and executionprocess between the carrier bearing device and each unit of the basestation are based on the same concept as the method embodiments of thepresent disclosure, so for details, reference can be made to thedescription of the method embodiments of the present disclosure, and norepeated description is provided herein.

Persons of ordinary skill in the art may understand that all or part ofthe steps of the methods according to the embodiments may be implementedby a computer program instructing relevant hardware. The program may bestored in a computer readable storage medium, and when the program runs,the processes in each method embodiment above may be included. Thestorage medium may be a magnetic disk, a CD-ROM, a read-only memory(Read-Only Memory, ROM), or a random access memory (Random AccessMemory, RAM).

The above describes the carrier bearing method and device, and the basestation provided in the embodiments of the present disclosure in detail.Persons of ordinary skills in the art can make modifications orvariations to the specific embodiments and application scope withoutdeparting from the idea of the embodiments of the present disclosure.The specification is not intended to limit the present disclosure.

What is claimed is:
 1. A carrier bearing method, comprising: obtaining,by a radio remote unit (RRU) which is within a base station in a radiocommunication system, transmit power of each carrier borne on all poweramplifiers in the RRU; adjusting, by the RRU, a correspondence betweenthe carriers and the power amplifier according to the obtained transmitpower, wherein the adjusting of the correspondence between the carriersand the power amplifier according to the obtained transmit powercomprises: adjusting the correspondence according to the obtainedtransmit power, so that total input power required by all the poweramplifiers in the radio remote unit under the adjusted correspondence issmaller than the total input power required by all the power amplifiersunder the correspondence; and bearing, by the RRU, each carrier on acorresponding power amplifier according to the adjusted correspondence.2. The method according to claim 1, wherein adjusting the correspondencebetween the carriers and the power amplifier according to the obtainedtransmit power comprises: adjusting the correspondence according to theobtained transmit power to make total input power required by all thepower amplifiers in the radio remote unit under the adjustedcorrespondence to be minimum.
 3. The method according to claim 2,wherein the number of carriers borne on all the power amplifiers in theradio remote unit is f, wherein f is an integer larger than 1; andadjusting the correspondence according to the obtained transmit powercomprises: calculating the total input power of all the power amplifiersunder each of n correspondences between the carriers and the poweramplifiers, wherein n is an integer smaller than or equal to pf, and pis the total number of power amplifiers in the radio remote unit and isan integer larger than 1; and obtaining a correspondence that is betweenthe carriers and the power amplifier and is corresponding to a minimumtotal input power among n total input power values, wherein thecorrespondence between the carriers and the power amplifier is theadjusted correspondence.
 4. The method according to claim 3, whereincalculating the total input power of all the power amplifiers under eachof n correspondences between the carriers and the power amplifierscomprises: obtaining a minimum value m of the number of power amplifiersrequired for bearing the f carriers in the radio remote unit; andcalculating the total input power of all the power amplifiers under eachof mf correspondences between the carriers and the power amplifiers; theobtaining the correspondence that is between the carriers and the poweramplifier and is corresponding to the minimum total input power valueamong the n total input power values comprises: obtaining acorrespondence that is between the carriers and the power amplifier andis corresponding to a minimum total input power value among mf totalinput power values.
 5. The method according to claim 2, wherein thenumber of carriers borne on the power amplifiers in the radio remoteunit is f, wherein f is an integer larger than 1; and adjusting thecorrespondence according to the obtained transmit power comprises:obtaining a minimum value m of the number of power amplifiers requiredfor bearing the f carriers in the radio remote unit, wherein m is aninteger larger than 1; and adjusting the correspondence according to theobtained transmit power, so that a mean square error of output power ofm power amplifiers in the radio remote unit under the adjustedcorrespondence is minimum or a difference between a maximum value and aminimum value of output power of m power amplifiers is minimum.
 6. Themethod according to claim 5, wherein obtaining the minimum value m ofthe number of power amplifiers required for bearing the f carrierscomprises: obtaining the minimum number m of the power amplifiersrequired for bearing the f carriers, according to maximum output powerof each power amplifier or the maximum number of carriers on each poweramplifier in the radio remote unit.
 7. A carrier bearing device,comprising: the carrier bearing device being within a base station, andthe carrier bearing device comprises: a carrier power obtaining unit,configured to obtain transmit power of each carrier borne on poweramplifiers in a radio remote unit; a correspondence adjusting unit,configured to adjust a correspondence between the carriers and the poweramplifier in the radio remote unit according to the obtained transmitpower, wherein the correspondence adjusting unit comprises: a powercalculating module, configured to calculate total input power of allpower amplifiers under each of n correspondences between the carriersand the power amplifiers according to the obtained transmit power,wherein n is an integer smaller than or equal to pf, p is the totalnumber of power amplifiers in the radio remote unit and is an integerlarger than 1, and f is the number of carriers on all the poweramplifiers in the radio remote unit and is an integer larger than 1; anda first obtaining module, configured to obtain a correspondence that isbetween the carriers and the power amplifier and is corresponding to aminimum total input power value among n total input power values,wherein the correspondence between the carriers and the power amplifieris the adjusted correspondence; and a carrier bearing unit, configuredto bear each carrier on its corresponding power amplifier according tothe adjusted correspondence.
 8. The carrier bearing device according toclaim 7, wherein the power calculating module comprises: a firstobtaining submodule, configured to obtain a minimum value m of thenumber of power amplifiers required for bearing the f carriers in theradio remote unit, wherein f is the total number of carriers borne onall the power amplifiers in the radio remote unit and is an integerlarger than 1; and a calculating submodule, configured to calculatetotal input power of all the power amplifiers under each of mfcorrespondences between the carriers and the power amplifiers; whereinthe obtaining, by the first obtaining module, the correspondence that isbetween the carriers and the power amplifier and is corresponding to theminimum total input power value among the n total input power valuescomprises: obtaining, by the first obtaining module, a correspondencethat is between the carriers and the power amplifier and iscorresponding to a minimum total input power value among mf total inputpower values.
 9. The carrier bearing device according to claim 7,wherein the correspondence adjusting unit comprises: a power amplifierquantity obtaining module, configured to obtain a minimum value m of thenumber of power amplifiers required for bearing f carriers, wherein m isan integer larger than 1, and f is the total number of carriers borne onall power amplifiers in the radio remote unit and is an integer largerthan 1; and a correspondence adjusting module, configured to adjust thecorrespondence according to the obtained transmit power to makes a meansquare error of output power of m power amplifiers in the radio remoteunit under the adjusted correspondence is minimum or a differencebetween a maximum value and a minimum value of output power of m poweramplifiers to be minimum.
 10. A base station, comprising: poweramplifiers, configured to bear carriers and perform power amplificationfor the borne carriers; and a carrier bearing device comprising: acarrier power obtaining unit, configured to obtain transmit power ofeach carrier borne on power amplifiers in a radio remote unit; acorrespondence adjusting unit, configured to adjust a correspondencebetween the carriers and the power amplifier in the radio remote unitaccording to the obtained transmit power, wherein the adjusting of thecorrespondence between the carriers and the power amplifier according tothe obtained transmit power comprises: adjusting the correspondenceaccording to the obtained transmit power, so that total input powerrequired by all the power amplifiers in the radio remote unit under theadjusted correspondence is smaller than the total input power requiredby all the power amplifiers under the correspondence; and a carrierbearing unit, configured to bear each carrier on its corresponding poweramplifier according to the adjusted correspondence.